If you come across a PDF file that you need to read on your phone or Kindle, and although some phones and the same Kindle allows you to read PDF format, the PDFs do not always look good on a Kindle, especially if they contain a lot of text and graphics. To maintain full compatibility, we need to convert them to MOBI format.
For the conversion we do not need any complications, or resorting to external programs for windows, Mac and Linux (such as Calibre), whichcould easily convert to PDF. What we will do is simply enter PDF4Kindle website, in where through a single click will accomplish the conversion. It even has an extension for Chrome if it is that we tend to convert many PDF to MOBI format.
We can upload from our drive directly the file to convert or even if we have it in some external service of storage (as long as you provide a public link to the file) or stored on a website. The conversion process will depend on how large the PDF, giving a link to download it and pass it to the Kindle well.
The only thing missing is that PDF4Kindle is that the output file can not be AZW, so it does not convert PDF to AZW, Amazon’s proprietary format which is supported by all devices of Amazon and Smartphones, Android tablets, iPhones and iPads, even though the site says yes converted to AZW. Also, sometimes PDF4Kindle failed to convert MOBI from a link on the web, leaving the frozen page.